General
Number of serial ports	8 Stück
Relative humidity	5–95 %

The Moxa CN2650-8 is an industrial terminal server designed for the secure and reliable transmission of serial data in critical networks. It features eight serial ports supporting RS-232, RS-422, and RS-485 interfaces, enabling the integration of legacy devices into modern IP-based networks. Devices in the CN2600 series are designed for use in demanding industrial environments where high availability and communication redundancy are required. With features such as Dual-LAN, Dual-Host redundancy, and optional Dual-AC power supply, they ensure uninterrupted data transmission even in the event of individual component failures.

Applications

The CN2650-8 is suitable for applications in industrial automation, energy supply, transportation, and other fields where serial devices such as sensors, controls, printers, or measuring instruments must be accessed over a network. Support for various operating systems, including Windows, Linux, UNIX, macOS, and Android, enables flexible integration into existing IT and industrial infrastructures. The devices are particularly suitable for environments requiring high availability and secure communication, such as production facilities, energy supply networks, or public transportation.

Features and Equipment in Detail

A central feature of the CN2650-8 is the Redundant COM Mode, in which data is transmitted simultaneously over two separate network connections. If one connection fails, communication remains uninterrupted, as data is routed through the second connection. Additionally, the device supports the Dual-Host Mode, enabling automatic switching to a backup host if the primary host becomes unreachable. These functions significantly increase the reliability of data transmission. The serial ports are accessible via RJ45 connectors, enabling flexible and robust cabling. The devices support various operating modes, including Real COM, TCP/UDP Server/Client, PPP, RFC2217, and Reverse Telnet, ensuring broad compatibility with different applications.

Technology Explained Simply

The network interfaces consist of two 10/100BaseT(X) RJ45 ports, enabling redundant network connections. Magnetic isolation of 1.5 kV protects internal circuits from electrical interference and voltage surges, which is particularly important in industrial environments. Power supply is provided via a voltage range of 100–240 VAC or 88–300 VDC (for HV models), with one or two inputs available depending on the model variant. Models with two inputs offer redundant power supply, further increasing availability. The devices are housed in a metal enclosure designed for mounting in a 19-inch rack. Dimensions are 480 × 198 × 45.5 mm (with mounting ears), enabling compact placement in standard racks.

Compatibility and Accessories

The CN2650-8 is compatible with a wide range of operating systems, including Windows, Linux, UNIX, macOS, and Android, enabling flexible integration into existing IT infrastructures. Security features include authentication via RADIUS or a local database, encryption using HTTPS, AES-128/256, HMAC, and RSA-1024, as well as protocols such as SSHv2, SNMPv1/v2c/v3, PAP, and CHAP. These features enable secure communication and device management. The devices come with an RJ45-to-DB9 cable included, simplifying connection to devices with DB9 interfaces. Additionally, a rack mounting kit, one or two network cables (depending on the model), a quick start guide, and a warranty card are included in the delivery scope.

Mounting and Installation

Mounting is performed in a standard 19-inch rack using the included mounting kit. Installation requires connecting serial devices via RJ45 or DB9 connectors to the corresponding ports on the terminal server. Network connections are established via the two RJ45 ports, with a redundant connection recommended to maximize availability. Power supply is provided via the appropriate input, with redundant power supply possible for models with Dual-AC power supply. Configuration is performed via a web interface accessible over HTTPS or via SSHv2, with security features such as authentication and encryption being activatable.

Operational Advantages

Operation of the CN2650-8 is characterized by high availability, security, and flexibility. Redundancy features such as Dual-LAN and Dual-Host mode ensure that communication continues to function even in the event of individual component failures. Broad compatibility with various operating systems and protocols enables easy integration into existing systems. Security features protect data transmission from unauthorized access and manipulation. The robust construction and high MTBF (up to 831,925 hours) guarantee long service life and low maintenance costs. The devices are designed for operating temperatures from 0 to 55 °C, with -T models also operable from -40 to 75/85 °C. Relative humidity is 5–95 %, non-condensing, enabling use in various environments. Certifications according to UL 60950-1 / UL 62368-1, EN 55032, FCC, IEC 61000-x, as well as RoHS, CRoHS, and WEEE confirm the safety and environmental compatibility of the device.